niks wrote:Why would digital camera be atypical?? Both my point-and-shoot and my DSLR use AA batteries! Although I run them on rechargeables now, I always keep a spare set of alkalines in the bag. Your example of heavy-duty use for MP3 players and radios sound stranger - how many iPods, Sansas, etc run on AAs?!
Regarding cost-effectiveness, let's be honest - the biggest difference in price for batteries comes from whether you buy in bulk or small sets. For most people, when you buy a bulk package, you are gonna want to use those for all your applications. So the most versatile battery wins it! Would you rather have a car in which you have to put gas twice as often and that you can use only in certain conditions, even if the gas price is the same?...
You might be right in general regarding Heavy-Duty batteries (I don't know - that document that you cited is from 2001), but I don't quite grasp your obsession with them.
I just hope people don't mistake you defending heavy-duty batteries' merits, to mean those Woot batteries are worth buying.
1) Digital cameras have an atypical discharge profile. Almost no other commonly used electronic device matches it. So to use it to warn others not to buy zinc chloride batteries is misleading. More common household uses are flashlights, clocks, remotes, radios, thermometers, timers, doorbells, etc -- none of which match the load profile of a camera. At worst, detractors should specify that heavy duties are not for cameras, which I've repeatedly said myself.
2) How many radios use batteries? Virtually all that I've seen. I'm not sure where you saw me mention MP3 players.
3) I disagree with the "most versatile wins" approach. I customize my batteries to the application. Lithiums for my smoke detector, alkalines for motorized and emergency devices , heavy duties for some low/moderate devices. And rechargeables where applicable.
Nowhere did I say that alkalines are not more convenient, but to call heavy duties useless is ignorant. Furthermore, if the versatility and convenience argument is true, then most devices should use lithiums -- long shelf life, longer use life, lighter (floats in water), better cold temperature profile, great performance in cameras, etc. But most people don't because of cost so to discount the cost/performance benefits of heavy duties is inconsistent.
3) If you don't like my source, find me a better or more current one. As a researcher by trade, I'd be grateful. As far I know, no major advances have been made in heavy duty (zinc chloride) or alkaline batteries since 2001, and the price ratiob (3-4x) is based on current experience. So unless you can invalidate my data, it stands as valid.
4) Obssession with them? As a researcher and former professor (Medical Physics), I'm obsessed with knowledge. I also spent 10 years as a volunteer consumer educator at a senior center. As you can see from my Quality Post rating, I don't just "obsessed" with batteries, but about sharing information. And if I'm wrong, I'd like to know it.
5) I have REPEATEDLY said that these are not real heavy duty (zinc chloride) batteries so if people make that mistake, it's their fault. In fact, the first message I posted on the matter stated this and it is highlighted as a Quality Post. And that is exactly my peeve -- bashing these batteries is valid, but too many people are discussing these as if zinc carbon and zinc chloride batteries are the same.